Preheat oven to 350 degrees F. Spray a 9x13 inch baking dish with cooking spray. Set aside.
Place shredded chicken in a medium bowl. Season with salt and pepper. Pour in 1/2 cup enchilada sauce, diced green chilies, sour cream and cumin. Stir to combine.
Divide chicken mixture evenly among the flour tortillas. This should be enough filling for 8 enchiladas. Roll up and place seam-side down in prepared baking dish. Pour the remaining enchilada sauce over the tops of enchiladas. (I only use about 1 can. If you like yours more saucy use both cans). Cover the tops with the shredded Pepper Jack cheese.
Bake for 30 minutes or until cheese is melted and bubbling. Remove from oven and let cool 5 to 10 minutes before serving. Serve with salsa, sour cream or whatever your favorite toppings are. Enjoy!